carricaburu



(No Model.) 2 Sheet-Sheet 1.

L. B. CARRICABURU.

STEAM AGTUATED VALVE.

N0.- 303,703. Patented Aug. 19, 1884.

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(No Model.) 2 Sheets-Sheet 2. L. B. GARRICABURU.

STEAM AOTUATED VALVE.

No. 303,703. Patented Aug 19, 1884.

Unrrnn S'rarns ATENT OFFICE.

. LEON B. CARRIGABURU, OF NEIV YORK, N. Y.

S'TEAM-ACTUATED VALVE.

I SPECIFICATION forming part of Letters Patent No. 303,703, dated August19, 1884.

l 7 Application filed January 21, 1884. (No model.)

To all whom it may concern.-

Be it known that I, LEON B. Giinnroiinnno, of the city and State of NewYork, have invented an Improvement in Steam-Actuated Valves, of whichthe following is a specifiea-' tion.

In my present invention I make use of two ports at both ends of thecylinder, one or both of which are open for the admission of live steam,but only one conveys away the exhaust, the adjacent one being covered bythe valve. The steam-piston,w11en it passes by the exhaust-port,compresses the confined steam, and said steam passes through a portandacts upon a piston that gives motion to the valve. As soon as thesteam is admitted by the movement of the valve the pressure continues toact upon the valve-moving piston to insure the full movement, and Iconstruct the ports with reference to the valve in such a manner thatsteam will pass in to move the valve correctly, even if the valve mayaccidentally oceupy a central position over the ports, thus preventingthe engine stopping by the arresting of the movement of the valve.

In the drawings, Figure 1 is a vertical section of the valve-chest andvalve. Fig. 2 is a plan of the valveseat, the same being adapted to a Dslide-valve. Fig. 3 is a section of the parts with a B slide-valve; andFig. 4 represents the parts, with the addition of a port and valve forlive steam to act in addition to the compressed exhaust.

The steam-cylinder A and piston B are of ordinary character. The steamchest 0 is provided with two cylinders,l) and D,in which are thevalve-moving pistons E E, with rods F F to the valve G. In Fig. 1 theoperative piston and its rod push the D -valve and move it and the otherpiston-rod and piston, and in Fig. 3 the operative piston and its redpull the B-valve and move it and the other piston and rod, the partsotherwise being similar. There are ports 1 and 2 from the valve-seat toone end of the steam-cylinder, and similar ports, 3 and 4, to the otherend of the cylinder. The length of the valvefaces and their distancesapart are such that one end port, 1, will be covered while the adjacentport 2 is open for the exhaust, and the steam-port 4. will also be open.

The exhaust- D, in front of the piston E.

chamber is at K. With the D-valve, Fig. 1, there is a branch port, 5,leading from the port 1 to the cylinder D, behind the piston E, and abranch port, 6, from 2 to. the cylinder There are simi lar ports, 7 and8, from 3 and 4, respectively, to the cylinder D. If the steam ispassing by 4 into the cylinder A, the port 1 is closed at its upper endby the valve G, the exhaust 2 is open to K, and the ports 7 and S areopen to D, so that the pressure is equal at both sides of thevalve-moving piston E, and the piston B will receive motion in thedirection of the arrow. The exhaust-port2 being open, theexhaust-pressure will bethe same at both sides of the piston E, becauseboth 5. and 6 are open by 1 and2 into the cylinder A; but as soon asthepiston B passes the port 2 it closes the same, and the confinedexhauststeam is com pressed in the cylinder A, ports land 5, and behindE, (the exhaust in front of E remaining open by 6 and 2 to K,) and assoon as the accumulated pressure is suflicient the piston E, the valveG, piston E, and rods F F are moved and the valve G admits steam by 1and closes the port 4.,- and allows the exhaust by 3 to K. If the valveG does not move full y,

the steam admitted by 1 will pass through 5,

insuring the complete movement of E, and this takes place before thesteam is admitted into 2 and 6 by the piston B moving in the oppositedirection and uncovering the port 2. The pistons E and E will remainquiescent in consequence of there being equal pressure up on both of thesurfaces. The same operations take place as the piston B approaches theport 4, the exhaust-steam is confined after the piston passes theexhaust 3, and is compressed and eventually moves the piston E and valveG in the other directiomadmitting steam by 1 into the cylinder A, andalso by 8 into the cylinder D,to insure the full movement of thevalve-moving piston and the valve back to the position shown in Fig. 1.

The length of the valve G is slightly less than the distance between theouter edges of the ports 1 and 4; hence both ports cannot be entirelycovered at the same time, or else there is a small notch cut in each endof the valve, as seen at 12 in Figs. 1 and 2, or in the outer edges ofthe ports 1 and 4, for the same purpose, so that steam can pass intoboth ports 1 and 4, and the piston B being at one end and covering theport 2, (or the port 8,) the steam will continue to act upon the pistonE, (or E,)'and will move the same and its connected valve G, thepressure 011 the other valve-moving piston being equalized, hence thefull movement of the valve is insured. The same effect is produced ifthe piston B is covering either port 2 or 3, because the piston B, incovering the port 2 or 3, acts as a valve to exclude steam from thevalve-moving piston at the side opposite to that upon which the livesteam is acting.

In place of the notches 12, holes may be made through the valve at ornear the ends, or through the valve-seat into the port; or there may besmall grooves made in the face of the valve, or of the valve-seat, orboth, to admit steam in the same manner as the said notches l2, and toeffect the same object.

The parts shown in Fig. 3 operate with the B slide-valve to produce thesame opening and closing of the ports and movementsof the valve, asaforesaid; but in consequence of the ports 5 and 8 leading to therespective cylinders D and D, at the sides of the pistons E E next tothe valve, the valve will be pulled along, instead of being pushed, asin Fig. 11, and this is the proper motion to be given to the Bslide-valve, for it will be seen that when the steam is passing by 4,(or by3 and 4,) with the cylinder A, the pressure through 7 and 8 upon Eis equal at both sides, and the exhaust in D is open at both sides ofthe valve-moving piston until the steam-piston B covers the exhaust-port2, and the confined steam is compressed untilits force is sufficient toact through the ports 1 and 5 and draw the valve G toward thevalve-moving cylinder E, reversing the position of the valve G andadmitting steam by 1 and 5 to the cylinders A D and causing the piston Bto move the other way.

If desired, there may be a third port, 14, at each end of the cylinder,as shown in Fig. 4, the same opening into the steam-cylinder at rathermore than the thickness of the piston from the end, and such port leadsat one end to the port 5 and at the other end to the port 8, and in suchports 14 there are valves 15, opening toward the valve-moving cylinders.The object of these ports 14 is to insure the movement of thevalvc-moving pistons and valve when the engine is moving slowly, for itwill be apparent that the piston B not only compresses the confinedsteam, but it also uncovers the port 14, admitting live steam from thecylinder A to act directly on thevalve moving piston, so as to insurethe proper movement if the compressed exhaust is insufficient. The valve15 in each port 14 prevents the steam exhausting through 14 when thevalve has been moved.

I claim as my invention 1. The combination, with the steam-cylin der andpiston and the valve, of the valvemoving pistons, the cylinders for thesame, and two ports near each end of the steam-cylinder, and branchports to the respective valve-moving cylinders at each side of thepistons, substantially as set forth.

2. The combination, with the valve and its valve-moving pistons, of thesteanrcylinder, and two ports at each end, with branch ports to thevalve-moving cylinder and pistons, substantially as set forth, wherebythe steam-piston, near each end of its stroke, closes one of the portsand compresses the exhauststeam and causes the same to actuate thevalve-moving piston, substantially as set forth.

3. In combination with the steam-piston, the valve-moving pistons andvalve, a valveseat with steam, the main ports slightly different inlength from the valve, so that steam cannot be entirely excluded fromthe ports, and branch ports from the main ports to the valve-movingcylinders and pistons, substantially as set forth.

4. The branch ports 14 and valves 15 th erein opening toward and incombination with the valve-moving cylinders and pistons and valve, andthe ports 1 2 3 4 and branch ports 5 6 7 8, substantially as set forth.

5. In a steamengine having valvemoving pistons and ports between thesteam-cylinder and the cylinders of the valve-moving pistons, valves intwo of such ports opening toward such valve-moving cylinders,substantially as set forth.

6. The combination, with a piston and steamcylinder, of a valve, twosteam-ports passing from the valve-seat to each end of the steamcylinderand valve-moving pistons, cylinders for the same, and ports,substantiallyas specified.

7. The combination, with apiston and steamcylinder of a valve having thenotches 12, two steam-ports passing from the valveseat to each end ofthe steam-cylinder and valvemoving pistons, cylinders for the same,andports, substantially as specified.

Signed by me this 10th day of January, A. D. 1884.

L. B. GABRIGABURU.

Correctio n in Letters Patent No. 303,703.

It, is hereby certified that in Letters Patent No. 303,703, grantedAugust 19, 1884, upon the application f Leon B. Oa 1:aburu, Of New York,New York, for an impropement in Steam-Actuated Valves, errors appear inthe printed specification requiring correetiorl, as follows: Iu line 33,page 2, the Word with should read into, and in line should be ornittedafter the "word with and and that the Letters Patent should 83, samepage, the word steam inserted after the word main in the same line beread with these correetions therein to conform to the reeord of the casein the Patent Office.

Signed, countersigned, and sealed this 23d day of September, A. D. 1884.[SEAL] H. M. TELLEB,

Secretary of the Interior.

Countersigned .B. G. DYRENFORTH,

Acting Commissioner of Patents.

